The correct answer is A. In that time, it was important to know where a person's family was from.
Family name has always been important in history. It is still important nowadays, but many might disagree with that.
There are multiple reasons. The most simple answer is because the rain that we consider acidic has a low pH; it has a higher amount of hydrogen ions.
Why does this happen? One is because of the release of sulfur dioxide into the environment to which we humans often contributed. However, it is also possible that increased levels of nitrogen oxide would have this effect as well. And nitrogen oxide can be released through lightning or volcanic eruptions, so these are occurences in nature that don't have anything to do with humans.
The correct answer among the choices provided is option A. Putting punctuation marks at the end of each sentence is an example of a grammar rule. A grammar is a set of standard rules about composition in a language. Some fields under grammar are morphology, phonetics, and syntax.
Shall I compare thee to a summer's day?
Thou art more lovely and more temperate.
Rough winds do shake the darling buds of May,
And summer's lease hath all too short a date.
Sometime too hot the eye of heaven shines,
And often is his gold complexion dimmed,
And every fair from fair sometime declines,
By chance, or nature's changing course untrimmed.
Sonnet Number 18 by William Shakespeare
hope this helps
